export default function(cls) {

  cls.defaultOptions = {
    // shortcutAction: false,
    /**
     * 场景树
     * @type {SceneTree.Tree}
     * @readonly
     * @instance
     * @memberof Earth
     */
    sceneTree: {},
    /**
     * 视角管理器
     * @type {CameraView.Manager}
     * @readonly
     * @instance
     * @memberof Earth
     */
    cameraViewManager: {}
  };

  cls.schema = {
  };

  cls.classification = [];
}
